242121113 has 16 divisors (see below), whose sum is σ = 268135056. Its totient is φ = 217205760.

The previous prime is 242121097. The next prime is 242121127. The reversal of 242121113 is 311121242.

It can be written as a sum of positive squares in 8 ways, for example, as 70694464 + 171426649 = 8408^2 + 13093^2 .

It is a cyclic number.

It is not a de Polignac number, because 242121113 - 2⁴ = 242121097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242121091 and 242121100.

It is not an unprimeable number, because it can be changed into a prime (242121133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168245 + ... + 169677.

It is an arithmetic number, because the mean of its divisors is an integer number (16758441).

Almost surely, 2^242121113 is an apocalyptic number.

It is an amenable number.

242121113 is a deficient number, since it is larger than the sum of its proper divisors (26013943).

242121113 is a wasteful number, since it uses less digits than its factorization.

242121113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804.

The product of its digits is 96, while the sum is 17.

The square root of 242121113 is about 15560.2414184356. The cubic root of 242121113 is about 623.2719094218.

Adding to 242121113 its reverse (311121242), we get a palindrome (553242355).

The spelling of 242121113 in words is "two hundred forty-two million, one hundred twenty-one thousand, one hundred thirteen".